The city said the price discrepancies are due to “a conceptual…estimate of construction costs.”

“This could be beautiful, but this also could be an absolute nightmare in terms of the view and what this will turn the riverbank into,” Russ Wyatt, Winnipeg City Councillor said on Monday.

“It seems like a lot of money to build basically a glorified crows nest up in the air.”

The completed project, which has been in the works for three years, would see the construction of a treetop lookout and sidewalk expansion along the Red River.

The original estimates of the promenade were considered ‘level 4’, meaning the price could potentially vary from 30 per cent less needed funding to 60 per cent more. Monday’s approval is labeled as ‘level 2’, so the $10 million dollar price tag could change to 10 per cent less or up to 20 per cent more.

Design work is currently ongoing and the city said they hope construction will start this winter while the riverbanks are low.

The rough timeline for the promenade will see the walkways in place by autumn of 2018.